Collapsible scaffolding extension



FIG. 1 is a perspective view of a collapsible scaffolding extension attached to a collapsible scaffolding showing my new design the broken lines showing the collapsible scaffolding are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a front elevational view of the collapsible scaffolding extension;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view thereof. 

The ornamental design for a collapsible scaffolding extension, as shown and described. 